NCS2200 Series, NCS2200A

http://onsemi.com

10

OPERATING DESCRIPTION

The NCS2200 Series is an industry first sub−one volt, low

power comparator family. This series is designed for

rail−to−rail input and output performance. These devices

consume only 10

mA of supply current while achieving a

typical propagation delay of 1.1

ms at a 20 mV input

overdrive. Figures 10 and 11 show propagation delay with

various input overdrives. This comparator family is

guaranteed to operate at a low voltage of 0.85 V up to 6.0 V.

This is accomplished by the use of a modified analog CMOS

process that implements depletion MOSFET devices. The

common−mode input voltage range extends 0.1 V beyond

the upper and lower rail without phase inversion or other

adverse effects. This series is available in the SOT−23−5 and

SOT−23−6 package. Additionally, the NCS2200 device is

available in the tiny DFN 2x2.2 package and the

SC70−5 package. NCS2200A is available in UDFN

package.

The SOT−23−6 features the enable function, which can be

externally controlled. This feature allows significantly

lower current consumption of 0.3

mA. This makes the

devices suitable for implementation in power sensitive

applications such as portable electronics. The enable

When the enable pin is driven low (device disabled), output

tri−state mode is activated. The device will remain in this

mode and will not respond to any changes at the inputs of the

comparator. In order to pull the device out of tri−state mode,

the enable upper voltage threshold must be met. Figure 15

shows the enable input voltage required to either enable or

disable the device, with a variance in supply voltage. In

addition, these devices have a typical internal hysteresis of

"8.0 mV. This allows for greater noise immunity and clean

output switching.

Output Stage

The NCS2200/1 has a complementary P and N Channel

output stage that has capability of driving a rail−to−rail

output swing with a load ranging up to 5.0 mA. It is designed

such that shoot−through current is minimized while

switching. This feature eliminates the need for bypass

capacitors under most circumstances.

The NCS2202/3 has an open drain N−channel output

stage that can be pulled up to 6.0 V (max) with an external

resistor. This facilitates mixed voltage system applications.

Figure 17. NCS2200/1SNxT1/NCS2200A

Complementary Output Configuration

Figure 18. NCS2202/3SNxT1 Open Drain

Output Configuration

Output

IN (+)

IN (−)

Output

IN (+)

IN (−)